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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampSarmah, Sweta-
dc.typeArtigopt_BR
dc.titleElko under spatial rotationspt_BR
dc.contributor.authorAhluwalia, Dharam Vir-
dc.contributor.authorSarmah, Sweta-
dc.subjectFísica de altas energiaspt_BR
dc.subjectAstrofísicapt_BR
dc.subjectCosmologia quânticapt_BR
dc.subject.otherlanguageHigh energy physicspt_BR
dc.subject.otherlanguageAstrophysicspt_BR
dc.subject.otherlanguageQuantum cosmologypt_BR
dc.description.abstractUnder a rotation by an angle ϑ, both the right- and left- handed Weyl spinors pick up a phase factor exp(± iϑ/2). The upper sign holds for the positive helicity spinors, while the lower sign for the negative helicity spinors. For ϑ = 2π radians this produces the famous minus sign. However, the four-component spinors are built from a direct sum of the indicated two-component spinors. The effect of the rotation by 2π radians on the eigenspinors of the parity – that is, the Dirac spinors – is the same as on Weyl spinors. It is because for these spinors the right- and left- transforming components have the same helicity [1, 2]. And the rotation induced phases, being same, factor out. But for the eigenspinors of the charge conjugation operator, i.e. Elko, the left- and right- transforming components have opposite helicities, and therefore they pick up opposite phases. As a consequence the behaviour of the eigenspinors of the charge conjugation operator (Elko) is more subtle: for 0 < ϑ < 2π a self conjugate spinor becomes a linear combination of the self and antiself conjugate spinors with ϑ dependent superposition coefficients – and yet the rotation preserves the self/antiself conjugacy of these spinors! This apparently paradoxical situation is fully resolved. This new effect, to the best of our knowledge, has never been reported before. The purpose of this communication is to present this result and to correct an interpretational error of a previous versionpt_BR
dc.relation.ispartofEurophysics letters : a letters journal exploring the frontiers of physicspt_BR
dc.relation.ispartofabbreviationEPLpt_BR
dc.publisher.cityBristolpt_BR
dc.publisher.countryReino Unidopt_BR
dc.publisherIOP Publishingpt_BR
dc.date.issued2019-03-
dc.date.monthofcirculationMar.pt_BR
dc.language.isoengpt_BR
dc.description.volume125pt_BR
dc.description.issuenumber3pt_BR
dc.rightsFechadopt_BR
dc.sourceWOSpt_BR
dc.identifier.issn0295-5075pt_BR
dc.identifier.eissn1286-4854pt_BR
dc.identifier.doi10.1209/0295-5075/125/30005pt_BR
dc.identifier.urlhttps://arxiv.org/abs/1810.04985pt_BR
dc.date.available2020-05-08T17:17:37Z-
dc.date.accessioned2020-05-08T17:17:37Z-
dc.description.provenanceSubmitted by Susilene Barbosa da Silva (susilene@unicamp.br) on 2020-05-08T17:17:37Z No. of bitstreams: 0. Added 1 bitstream(s) on 2020-08-27T19:15:43Z : No. of bitstreams: 1 000460823200001.pdf: 263085 bytes, checksum: aaca206214f415d757300cb700b360b5 (MD5)en
dc.description.provenanceMade available in DSpace on 2020-05-08T17:17:37Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-03en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/340446-
dc.contributor.departmentSem informaçãopt_BR
dc.contributor.unidadeInstituto de Biologiapt_BR
dc.subject.keywordTheory (hep-th)pt_BR
dc.subject.keywordGeneral Relativitypt_BR
dc.identifier.source000460823200001pt_BR
dc.creator.orcid0000-0001-9393-8329pt_BR
dc.type.formArtigopt_BR
dc.identifier.articleid30005pt_BR
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